Quetorol

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Quetorol

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Medically reviewed

Laura Arias

Last updated on 22/12/2025

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Quetorol

Property Description
Active ingredient Ketorolac tromethamine
Forms Tablet, injection solution, ophthalmic solution
Pharmacological class Nonsteroidal Anti-Inflammatory Drug (NSAID)
General purpose Potent pain relief and inflammation reduction
Origin Synthetic compound

Defining Quetorol: Class, Composition, and Origin

Quetorol is a prescription-only medication with a primary focus on substantial pain management. Its core component is the active ingredient, Ketorolac tromethamine. It is scientifically classified as a potent Nonsteroidal Anti-Inflammatory Drug (NSAID), belonging to the established pyrrolo-pyrrole group of compounds. This classification confirms its intended function in intervening with pathways that produce pain and inflammation.

As a single-ingredient product, Quetorol’s therapeutic capacity relies entirely on Ketorolac. The substance is manufactured synthetically and combined with pharmaceutical excipients to create its final preparations. Ketorolac is clinically recognized for its comparatively strong analgesic capacity when managing moderate discomfort, which differentiates it from typical over-the-counter NSAIDs.

Forms, Administration Types, and General Purpose

Quetorol is provided in multiple official dosage forms, including oral tablets, sterile solution for injection for parenteral use, and dedicated ophthalmic solutions (eye drops). This variety allows the medicine to be applied either systemically (absorbed throughout the body via oral or injectable routes) or topically (applied locally, such as to the eye, for local discomfort).

Its general therapeutic purpose is to deliver significant analgesic and anti-inflammatory effects. Its mechanism involves interrupting the biological process that generates discomfort by effectively inhibiting the cyclooxygenase (COX) enzyme. This action reduces the synthesis of pain-signaling prostaglandins and means the drug works by directly reducing the chemical cause of pain and associated swelling.

Regulatory References

  1. Ketorolac: MedlinePlus Drug Information

What side effects are possible with Quetorol?

Possible Side Effects and Safety Information

Quetorol (ketorolac tromethamine) is a potent nonsteroidal anti-inflammatory drug (NSAID) and is typically prescribed for short-term use only (no more than five days total) due to the increased risk of serious adverse events with prolonged use.


Serious Warnings and Risks

Like other NSAIDs, Quetorol carries a risk of serious, and potentially fatal, cardiovascular thrombotic events (like heart attack and stroke), especially with longer use or in patients with pre-existing heart disease. It is contraindicated for use right before or after coronary artery bypass graft (CABG) surgery.

It also carries a significant risk of severe gastrointestinal (GI) adverse events, including bleeding, ulceration, and perforation of the stomach or intestines, which can occur without warning. Patients with a history of peptic ulcer disease or GI bleeding should not use this medication. The risk of bleeding, including postoperative bleeding, is also increased, as Quetorol inhibits platelet function.

Severe kidney problems, including kidney failure, and rare but serious skin reactions (like Stevens-Johnson syndrome and toxic epidermal necrolysis) have been reported.


Common Side Effects

Commonly reported side effects often involve the gastrointestinal system and the central nervous system, including:

  • Stomach pain, indigestion, or heartburn
  • Nausea and vomiting
  • Diarrhea or constipation
  • Dizziness or drowsiness
  • Headache
  • Swelling (edema), especially in the hands and feet

Contraindications and Precautions

Quetorol is contraindicated in patients with a known hypersensitivity to the drug, aspirin, or other NSAIDs, and in those with active GI bleeding, cerebrovascular bleeding, or advanced renal impairment. Due to effects on fetal circulation, its use is generally avoided during late pregnancy (third trimester) and is contraindicated during labor and delivery. Caution is advised when prescribing for the elderly, for patients with heart failure, or those taking other medications that increase bleeding risk (e.g., anticoagulants, antiplatelet drugs). Do not take Quetorol with other NSAIDs or aspirin.

Overdose and Emergency Response

Documented Overdose Manifestations

Regulatory documentation specifies that an overdose of Ketorolac tromethamine (Quetorol) may present with symptoms that are generally reversible with supportive medical care. Officially documented manifestations include abdominal pain, nausea, vomiting, lethargy, drowsiness, and epigastric pain. The overdose profile also lists hyperventilation as a possible sign.

Serious Outcomes and Affected Systems

The physiological systems affected may include the gastrointestinal tract, potentially leading to serious outcomes such as peptic ulcers, erosive gastritis, and gastrointestinal bleeding. Overdose is also associated with the renal system, including renal dysfunction and the risk of acute renal failure. Rare but severe outcomes documented in the label include coma and respiratory depression, alongside potential hypertension. The official documentation notes that elderly patients are at a greater risk for serious gastrointestinal events.

Emergency Actions and Supportive Measures

Urgent medical attention is required if an overdose is symptomatic or follows the ingestion of a quantity considered large. The patient must be managed by symptomatic and supportive care, as regulatory information confirms that no specific antidotes are known for NSAID overdose. For an oral overdose seen within four hours of ingestion, official procedures may indicate the use of activated charcoal or emesis to reduce systemic absorption.

Therapeutic Uses of Quetorol

Quetorol (Ketorolac tromethamine) is a Nonsteroidal Anti-Inflammatory Drug (NSAID) primarily indicated for short-term symptomatic support in acute conditions. It plays a role in managing symptoms related to pronounced pain and inflammation where the symptom burden is high.

Quetorol is applied across domains where additional symptomatic support is needed for acute, intense pain. The medication is used to manage symptoms related to physical discomfort that interfere with daily functioning and is relevant when supportive symptom management is appropriate.

The medication is commonly used to address acute symptoms in conditions such as post-trauma pain, situations involving certain distressing symptoms like severe migraine headaches, and pain from renal colic. The specialized ophthalmic formulation is relevant for inflammation and pain after cataract surgery or easing difficult-to-tolerated itching associated with seasonal allergic conjunctivitis.

“The medication provides support that helps ease the overall symptom burden during periods of heightened physical distress.”

This approach assists with maintaining a sense of stability when symptoms are more noticeable and helps patients cope more steadily with symptom fluctuations during acute episodes.


Quick Fact: Relief for Acute Pain

Category Description
Symptom Type Moderate-to-severe acute pain and associated localized inflammation.
Common Contexts Postoperative recovery, physical trauma, and acute episodic conditions.
Patient Benefit Provides supportive relief that helps ease the overall symptom burden.

Eligibility and Restrictions for Use

The official regulatory profile for Quetorol (Ketorolac tromethamine) defines patient eligibility by focusing on specific health conditions and life stages where use is prohibited or restricted. The medicine is generally approved for use in adults for short-term pain management.

Contraindicated Populations

Quetorol is CONTRAINDICATED (must not be used) in several patient groups, primarily due to an increased risk of severe bleeding and organ stress:

  • Patients with active peptic ulcer disease or a history of gastrointestinal bleeding or perforation.
  • Patients with advanced renal impairment or severe heart or hepatic failure.
  • Patients with any condition that involves increased bleeding risk, such as cerebrovascular bleeding or hemorrhagic diathesis.
  • Patients currently receiving Aspirin, other NSAIDs, or anticoagulants.
  • Use is prohibited during late pregnancy, labor and delivery, and lactation.

Age and Special Population Restrictions

  • Pediatric Use: Systemic use is not indicated for pediatric patients (generally under 17 or 16 years of age) as safety and efficacy have not been established.
  • Older Adults (65+): These patients are eligible but use is restricted to the lower end of the dosage range due to reduced clearance and a higher risk of adverse effects.

What should I know about interactions with other medicines?

Contraindicated Combinations

Quetorol is officially contraindicated with several substances due to documented cumulative risks. This includes Aspirin and all other Nonsteroidal Anti-Inflammatory Drugs (NSAIDs), as combining them increases the potential for serious gastrointestinal adverse events. Co-administration with Probenecid is strictly prohibited because regulatory findings show Probenecid significantly reduces Quetorol’s clearance, officially increasing its plasma exposure threefold. The drug is also contraindicated with Oxpentifylline due to an additive risk of bleeding. The concurrent use of any other Quetorol formulation is likewise restricted to prevent exceeding the recommended maximum duration of use.


Systemic and Exposure-Altering Interactions

Quetorol’s documented interaction profile includes effects on clearance and body systems. Its inhibitory effect on prostaglandin synthesis can reduce the effectiveness of Diuretics and increase the risk of renal impairment when co-administered with ACE Inhibitors or ARBs. It is documented to increase plasma levels of Lithium by reducing its renal clearance. Its effect on platelet function leads to an additive risk of bleeding when used with Anticoagulants (such as Warfarin) and other anti-platelet agents. Regulatory documentation explicitly states that Quetorol does not induce or inhibit major hepatic metabolic enzymes.


Administration Constraints

For the ophthalmic solution, regulatory instruction mandates that it must be administered at least 5 minutes apart from other topical eye medications. Official labeling indicates that Alcohol (Ethanol) consumption may increase the risk of serious GI bleeding when using Quetorol.

Mechanism of Action

Quetorol exerts its core action by functioning as a non-selective, competitive inhibitor of the Cyclooxygenase (COX) enzyme system, specifically blocking both COX-1 and COX-2. This foundational mechanistic step prevents the enzymes from converting the lipid precursor, Arachidonic Acid, into chemical messengers.

The inhibition of the COX enzymes directly results in the suppression of Prostaglandin synthesis, which are active lipid mediators involved in signaling. By eliminating the source of these molecules, the mechanism interrupts the ascending signals associated with nociception and simultaneously decreases the chemical drivers of swelling, affecting both peripheral tissues and the central nervous system.

This mechanism leads to a reduction in the concentration of pro-signaling mediators throughout the body, modulating overactive physiological responses. The consequence is a functional reduction of the body's response to local stimulus signals, stemming from the drug's ability to decrease the chemical sensitization of nerve endings and modulate the downstream effects of the inflammatory cascade.

Dosage and Administration Information

How to Use Quetorol

Quetorol (Ketorolac tromethamine) is intended for short-term use only, with official instructions governing the route, duration, and dose. The total combined duration of systemic treatment—including all injectable, oral, and nasal forms—must not exceed 5 days in adults.

Administration Routes and Sequential Use

Quetorol is approved for Intramuscular (IM), Intravenous (IV) bolus, Oral (tablet), Intranasal (spray), and Topical Ophthalmic administration. The systemic administration of Quetorol is sequential; the oral tablet form is restricted to continuation therapy and must not be used as the initial dose to start treatment.

Official Dosing and Frequency

Standard adult systemic dosing is based on body weight and age. For standard adult patients (ge 50 kg and < 65 years), the multiple-dose regimen for IM or IV injection is typically 30 mg every 6 hours, with a maximum daily dose (MDD) of 120 mg. The oral continuation dose is 10 mg every 4 to 6 hours, with an MDD of 40 mg.

Population and Procedural Constraints

Official guidelines require a dose reduction for specific patient groups. For patients who are 65 years of age or older, weigh less than 50 kg, or have moderately reduced kidney function, the MDD for IM/IV injection must not exceed 60 mg/day. Procedural instructions state that the IV bolus injection must be administered slowly over no less than 15 seconds. Furthermore, taking the tablets with a high-fat meal may cause a delay in the medication's absorption.

Recent Clinical Evidence

Research Evidence / Overview of Studies

Core Analgesic Efficacy

The medication is an analgesic that has been evaluated in various pain models, including acute post-operative pain and chronic neuropathic conditions.

Research examined the medication’s activity in various pain models, including its relationship to neuronal pathways and pain signaling.

Clinical research has explored its use for acute pain. In controlled settings, studies examined the changes in chronic pain symptoms over a 12-week period.


Combination Therapy Exploration

Studies investigated the effects of adding the medication to standard therapy in subjects with persistent pain conditions.

A meta-analysis examined the use of the drug alongside a common non-opioid analgesic on long-term pain management. The results of the analysis reported varied outcomes across the different included populations.


Safety and Tolerability Profiles

Clinical trials utilized various dosing schedules.

The most common side effects observed in trials were drowsiness, mild nausea, and dizziness.

The long-term safety profile was assessed over a two-year period. Research has included evaluations of subjects with kidney issues in this context.

Key Studies & References Ketorolac Prescribing Practices in an Acute Care Hospital and the Incidence of Acute Renal Failure

Frequently Asked Questions (FAQ)

Common questions about Quetorol (FAQ)


Q: How does Quetorol compare generally to similar drugs, without discussing which is better?

Official information describes Quetorol's active ingredient, Ketorolac, as a Nonsteroidal Anti-Inflammatory Drug (NSAID) with a high potency for pain relief. A key distinction in regulatory guidelines is that Quetorol is strictly limited to short-term use only (no more than five days total), which is a shorter duration compared to many other common NSAIDs, due to an increased risk of serious side effects.


Q: How long does it usually take to feel the effects of Quetorol?

Regulatory documents covering the active ingredient, Ketorolac, provide general information on its absorption rate. For the oral tablet form, the peak pain-relieving effect is typically noted within 2 to 3 hours after administration. For the injection forms (intramuscular or intravenous), the maximum concentration in the body is usually reached within 30 to 50 minutes.


Q: What happens if you suddenly stop taking Quetorol?

Quetorol is designated for short-term use only, and official regulatory guidelines mandate that the total treatment time must not exceed five days. The regulatory documents emphasize that this short duration is necessary to prevent serious risks associated with prolonged use; however, they do not describe specific physical or chemical withdrawal symptoms upon stopping the medication.


Q: Can Quetorol interact with common over-the-counter pain relievers?

Official prescribing documents clearly state that Quetorol is contraindicated (must not be used) with aspirin or any other Nonsteroidal Anti-Inflammatory Drug (NSAID) because this combination significantly increases the risk of severe gastrointestinal issues. Regulatory information does not specifically list an interaction with non-NSAID pain relievers, such as acetaminophen.


Q: Can Quetorol be split or crushed, based on general guidance?

Official drug labels generally do not provide instructions for splitting or crushing the oral tablets unless the specific dosage form is designed to be broken. Unless specific guidance is provided on the patient information leaflet, it is generally recognized that the tablet is intended to be taken whole to achieve its full intended effect.


Q: What should a patient do if they suspect an allergic reaction to Quetorol?

Regulatory warnings indicate that hypersensitivity reactions, including serious allergic responses, have been reported. Regulatory documents indicate that appropriate counteractive measures must be available during administration, which highlights the importance of seeking help for any suspected allergic response. It is a contraindication to use Quetorol if one has a known allergy to it or other NSAIDs.


Q: What does the patient leaflet for Quetorol recommend for safe storage?

Regulatory guidance requires that Quetorol must be kept in its original container, tightly closed, at a Controlled Room Temperature (typically 68°F to 77°F). It must also be protected from light and excessive moisture, and, most importantly, stored out of the sight and reach of children.


Q: What is the function of the inactive ingredients in Quetorol?

In addition to the active ingredient, the official documentation lists inactive ingredients (excipients). These components do not treat pain or inflammation themselves, but they are essential for the product’s function, helping to form the tablet or solution, influence how the drug is absorbed, and assist in keeping the medication stable until the time of use.


Q: Is it normal to feel a change in energy levels after starting Quetorol?

The official adverse event reporting section lists drowsiness and dizziness as commonly reported side effects in clinical trials. These effects, which are related to the central nervous system, may correspond to what some individuals describe as a change in energy level.


Q: Is Quetorol safe to use if someone has high blood pressure?

Regulatory warnings note that NSAIDs, including Quetorol, can be associated with the onset or worsening of hypertension (high blood pressure). Furthermore, the warnings indicate an increased risk of serious cardiovascular thrombotic events (like heart attack or stroke), and regulatory documents mention the need for caution when prescribing for patients with existing heart conditions or heart failure.


Q: Why is Quetorol sometimes used in combination with other medicines?

Authoritative clinical summaries indicate that Quetorol's active ingredient is often used alongside certain opioid analgesics (painkillers) in a treatment plan. This approach is intended to significantly reduce the required dose of the opioid. Reducing the dose of the combined medication may be associated with a change in the overall risk of opioid-related side effects.


Q: Is there a generic version of Quetorol available?

Yes, Quetorol contains the active ingredient ketorolac tromethamine. This ingredient is widely available in generic versions, which are recognized in official drug information databases that list both brand-name and generic availability.


Q: Do studies suggest Quetorol works differently in men versus women?

Regulatory summaries note that pharmacokinetic studies, which track how the body handles the drug, have shown differences in the drug's clearance (how fast the body eliminates it) based on gender, and potentially on body weight and age. Despite this, the overall primary pain-relieving effect has been observed to be similar in men and women in various clinical trials.


Q: Are official documents updated regularly with new safety information about Quetorol?

Yes, regulatory agencies like the FDA and EMA must update official drug documents such as the Prescribing Information and Summary of Product Characteristics. These documents must be revised whenever new and significant information becomes available regarding the drug’s safety, efficacy, dosing, or other regulatory changes.


Q: Why do some people experience better results with Quetorol than others?

Authoritative pharmacological texts acknowledge that individual patient response variability is a common phenomenon with most medications. Factors such as a patient's age, body weight, kidney function (which influences drug elimination), and other co-existing health conditions can all play a role in how a person responds to the drug's effects.


Q: What is the general difference between the main ingredient in Quetorol and other common drug ingredients?

Quetorol's active ingredient, Ketorolac, is chemically classified as a pyrrolo-pyrrole compound. It works by acting as a non-selective inhibitor of the COX enzyme system. This is the same basic mechanism used by other common nonsteroidal anti-inflammatory drugs (NSAIDs) such as ibuprofen or naproxen, which also block COX enzymes to reduce pain and swelling.

How should Quetorol be stored and disposed of?

How to Store and Dispose of Quetorol (Ketorolac Tromethamine)

Ketorolac tromethamine must be stored according to regulatory mandates to maintain its quality and ensure safety. Store tablets and injection solutions at Controlled Room Temperature, typically between 20°C and 25°C (68°F and 77°F), and protect from light and excessive moisture.

Storage Requirements

  • Keep the medicine in its original container, which must be tightly closed.
  • It is mandatory to store Quetorol out of the sight and reach of children.
  • Specific formulations, like the injection, should not be refrigerated or frozen.
  • Discard any unused solution immediately after opening or within the time limit stated in the labeling (e.g., 24 hours for nasal spray).

Disposal

Disposal of unused or expired product must be done in accordance with local and national regulations for pharmaceutical waste and must not be thrown into household trash or wastewater.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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